Automatic chain lock



April 5, 1938; E. P. BEAUM ONT 2,113,105

- AUTOMATIC CHAIN LOCK Filed Jan. 14, 1957 4 Sheets-Sheet 1 V ATTORNEY April 5, 1938. E. P. BEAUMONT AUTOMATIC CHAIN LOCK Filed Jan. 14, 1957 4 Sheets-Sheet 2 mom INVENTOR Ewgefle P. Be

April 5, l

E. P. BEAUMONT AUTOMATIC CHAIN LOCK Filed Jan. 14, 1937 4 Sheets-Sheet 5 April 1938. E. P. BEAUMONT 2,113,105

AUTOMATIC CHAIN LOCK Filed Jan. 14, 1937 4 Sheets-Sheet 4 j INVENTOR Patented Apr. 5, 1938 UNITED STATES:

AUTOMATIC CHAIN LOCK Eugene P. Beaumont, New; York, N. Y., assignorto Whiting Manufacturing Company, Minneapolis, Minn., acorporation of Minnesota Application January 14, 1937, Serial No. 120,475

4' Claims.

The present. invention. relates to locks, the

components of which are permanently mounted.

on a door and its jamb', and more particularly to the type for effecting a chainconnection.

5 An object of this invention is to provide a novel and improved lock for automatically effecting a chain connection between a door and its jamb, and for automatically removing such connection, by a key-controlled means operative from the outside and also from the inside surfaces of the door, which look shall embody novel and improved mechanisms to attain a better control of the moving parts, and which lock is an advance with respect to my previous invenl5 tions in this type of apparatus identified by. my

Patent No. 2,075,015 dated March 30, 1937, and

A further object of this invention is to provide in a lock ofiering the aforementioned features, novel and improved means for controlling and actuating the various co-operative mechanisms of the device, in proper-timed relation.

Other olojectsanrl advantages will become manifest as the disclosure proceeds herein.

In the accompanying drawings, forming partof this application, similar characters of reference indicate corresponding parts in all the views.

Fig. 1 shows a front view of the lock structure which is mounted on the door, including the chain conveying arm.

Fig. 2. is aside view thereof.

Fig. 3 shows the chain member used in this lock.

Fig. 4 shows the cam which controls a latch for securing the free end-of the chain to the remote end of. the conveying arm.

Fig. 5 shows a front view of the mechanism Fig..l2:.showslin perspective,.the latch element which is housed within a chamber in the, lock.

employed-to secure the free end of the chain to the conveying arm.

Fig. 13 is a gage memberusedin the-contriv ance.

Fig. 14 1s aside view thereof.

Fig. 15 is a ring member used as'a collar on the casing. a

Fig. 16 is a side view thereof:

Fig. 17 shows the key.

Fig. 18 is asectional view of abushing.

Fig. 19 isa side view thereof.

Fig. 20 showsanother bushing.

Fig. 21 is a side view thereof.

Fig. 22 is a front'view. of. the keeper adapted to be mounted onth'e jamb.

Fig. 23 is-a left side view. thereof;

Fig. 24 is a right side view thereof- Fig. 25 is a fragmentary viewrof the casing cover.

Fig. 26-is.a'side:view thereof.

Fig. 27: is similarto that ofFig. 2" having-a key-operative cylinder mechanism including; a. clutch means in open position;

Fig. 28-shows the same withthe clutch means inengaged position dueto the insertion of the key.-

Fig. 2 9 is a diagrammatic representation showing the complete look as appearing while the'door' is unlocked, meaning, free of a chain connection;

Fig; 30 is a similar view, as, appearing while the door is locked showing a: chain connection between the door and jamb.

Fig. 31' is an exploded view showing the components of the clutch mechanism an'dithe key-operative cylinder on which they are mounted.

In the-drawings, the chain conveyor arm I30, extends radially outwardintegrally from: the easing cover I3I,,which caps the cylindrical casing member" I-3-2. These-partsare-heldagainst I.0.=- tation relative to one another; because-the diametrically apposite lugs I33; extending: outwardly. from the casing. member I32,.fitinto the slots I 34 in the casing cover, andthese-parts are main.- tained as aunitary structure, by means of the pair of. engaging. bushings I35 and I36; The wall of the casing member I32; is-v cut to formelement I31, which receives. for. permanent: mounting thereon, the link. I38", of the. chain I39; At the free end of. this chain, is: a cross-pin I404. one end of which,.indicatedx by the numeral MI, is adapted to lie within. the crotch:v I42; at. the. remote endiof. the conveyor arm I30; A. latch" I43;.slidablymounted on: the conveyorarm, 6X1" tends i'ntoxthezcasing I32 tozbe controlledzby. the;

cam I44, is adapted to secure said cross-pin I40, within said crotch I42.

A plate I45, partitions the casing member I32, into the cylindrical chambers I46 and I41. This plate has a central bore for admission of the bushing I36, and another opening I48, through which extends the cam follower pin I49, from the end of the arm of lever I50, the latter pivoted on pin I5 I, and controlled by coil spring I52, to maintain the follower pin I49, against the periphery of the latch control cam I44; the bent end I53 of the latch I43, being engaged in the bifurcated bent end of the arm of the lever I50, indicated as I54. To prevent rotation of the bushing I36, it is provided with a socket I55, in the underside of its flange, to set onto the stop prong I56, which is formed out of the metal of the casing cover I3I.

The casing member I32, carries the base plate I51, a ring I58 having an outwardly extending gage arm I59, and the ring I60; only the latter being fixed thereon by the screw I6I, the others being relatively rotatable one to the other. The base plate I51, is adapted to be secured onto the door 10. It is evident that all the components thus far mentioned are assembled to be a unitary structure; there being a flange I62, at the uncapped end of the casing member I32, to journal said member to the base plate I51. The tooth I63, extending from ring I60, is adapted to engage the ring I58, at stops I64 and I65.

The keeper, designated generally by the numeral I66, is adapted to be mounted on the jamb I03. It comprises a base plate I61, and an open casing I68, having an opening I69, in its side nearest the door, to receive the remote end of the gage arm I59, and a crotch opening I in its front face, to receive the headed end I1I of the chains cross pin I 40. The crotch opening I 10 is arcual, having as its radius, the distance between the axis of the shaft I12, and the axis of the cross pin I40; the former point being the centre of the circle of which it is an arc. The lower portion I13 of the crotch opening is towards the door 19. A spring I14, fixed by pins I15, and the side wall of the keeper casing, extends free within same, and such free arm thereof is normally across the arcual opening I10 of the keeper crotch.

A dished sub-base plate I16, has journalled therethrough, the shaft I12, which carries fixed thereon a cam I11, within the hollow I18 thereof at one side, and the gear I19 on the other side of said plate I16. A major segment of a flat, narrow, circular ring, indicated by the numeral I80, is secured onto the sub-base plate I16, concentrically about and spaced from the periphery of the gear I19, only slightly. An internal gear I8 I, having the stops I 91 and I 98, on its external periphery, lies concentrically about and slightly spaced from the spacer I80, and is driven by the gear I19, through the pinion I84, which is rotatably mounted on a shaft I85, fixed to and extending from the sub-base plate I16. Thelatch control cam I44, sits loosely on shaft I 12, and is maintained against rotational movement with respect to said shaft, because pinion shaft I85 is received in hole I86. To maintain the assembly of the components carried on the subbase plate I16, the pinion shaft is slightly riveted over the cam I44. The peripheral diameter of the internal gear I 8|,meaning its external dimension, substantially equals the internal diameter of the casing I32, with which said gear has slight clearance. The sub-base plate I16, is

pinned at I81 to the base plate I51. The shaft I12, lies through the bushings I35 and I36, is rotatable therein, and is provided with a longitudinal key slot I88, to receive the key I89, for operation from the inside surface of the door.

A bolt I90, is slidably mounted and extends through the wall of the dish of the sub-base plate I16, and its movement is controlled by the cam I11, against which its bent end I9I, serves as a cam follower, urged by the action of the compression spring I92, one end of which spring ispositionedonthe fixed pin I93, extending within the hollow I18, of the plate I16. The casing member I32, is provided with a pair of diametrically opposite slots I94 and I95, which are adapted to receive the bolt I90, when shifted therein by action of the cam I11 controlling said bolt. Said casing member I32, also has internally extending lugs I96, lying between the stops I91 and I98, on the external periphery of the internal gear I8I, and in the path of such stops. Although only one such lug I96 is essential, two are provided in diametric relation, to attain a more even drive. A socket I99 is provided at the end of the shaft I12, for engagement by the key controlled mechanism.

The cylinder means indicated generally by the numeral 200, is normally wholly independent and without any physical connection with the lock mechanism proper of Fig. 1. I remove the shank of an ordinary cylinder means, and provide the key I89, which fits such cylinder mechanism, with a forward tab 20I, adapted to pass through and project outwardly from the shank slot 202 in the end plate 203, which turns with the cylinder. Within a cup 204, having a flanged rim 205 the size of the plate 203, and a shank slot 206 in its bottom, is a headed shank 201 capable of slidable movement therein, carrying the coil spring 208 thereabout. The length of the shank 201, is such that its end 201' lies within the slot 206. This cup 204, withits related components described, is secured to said end plate 203. When the key I 89 is inserted in the cylinder mechanism 200, its tab 20I, will enter the cup 204, thereby pushing the headed shank 201 into the socket I99 of the shaft I12, to establish mechanical connection with the lock mechanism of Fig. 1.

Upon withdrawal of the key I 89, the spring 208, which had been compressed, will shift the headed shank 201 to its initial position, whereby the keyoperated cylinder means 200, and the lock mechanism of Fig. 1, are divorced, for said shank will withdraw from its connection with the shaft I12.

When the lock is in unlocked rest condition, as in Fig. 29, the related positions of the components comprising the actuating mechanism is shown in the Figs. 5, 7 and 27, at which time lugs I96 are against stops I91, cam follower I49 is at 209, whereby the cross-pin I40 is secure in the crotch I42, and tooth I63 is against stop I64. Now. upon insertion of key I89 into the cylinder mechanism 200, so that connection is made with the shaft I12 as aforesaid, and upon turning said key, whereby said shaft will likewise turn, gear "9- on said shaft, will drive pinion I84, whereupon the internal gear I8I will turn about the spacer I80 as its shaft. At the commencement of this operation, cam I11 will cause the withdrawal of the bolt I90 from casing slot I94, while stop I91 0n the internal gear IBI moves away from the casing lug I96, and stop I98 approaches said lug. The casing I32 is now freed of the base plate I16, and upon further rotational movement of the shaft I12, with stop I98fagainst lug I 96, the casing will be turned, the conveying arm I30 will approach the keeper I66, and the headed end I'll of the cross-pin I40 will be conveyed and deposited in the crotch opening I10, whereupon cam follower I49 will reach region 2"] of cam I44, and action of the spring I52 will shift said follower so that latch I43 will move to free the cross pin I40 from the conveying arm I30. Upon further rotation of the shaft I12, the arm I30 will be swung to lie as shown in Fig. 30, and shaft I12 having made a complete revolution, the spring I92 will cause bolt I90 to enter the casing slot I95, thereby fixing the casing. Crotch I42 is open, that is free from latch I43. The cross-pin I40 has been drawn into portion I13 of the crotch opening against the spring I14, and the chain I39 is taut. The key I 89, may now be withdrawn from the cylinder mechanism 200.

It is to be noted, that during the locking operation, upon movement of the casing I32, tooth I63 moved away from stop I64, whereby ring I58 became loose, and as soon as said tooth reached the stop I65, the gage arm I59 was swung towards the keeper I66, and entered same at I69. The bottom of slot I69, prevents arm I59 from falling further downward, and stop I65 holds it against upward movement. In this way, no planer displacement of the lock structures on door and jamb can occur.

The relative number of teeth of shaft gear I19 and the internal gear I8I is such, so that upon one complete revolution of the former, the latter will move an arcual distance equal to the space between the stops I91 and I98, less the width of the casing lug I96, plus a complete half revolution.

To restore the lock to rest open position, the key I89 is turned in reverse direction, whereupon bolt I90 will be withdrawn from the casing slot I95, and then casing lug I96 will approach and contact with stop I91, and it is evident that the operation of all mechanism is exactly in reverse; the cam I44, being so designed, that latch I43 will be shifted to lock the cross pin I40 in crotch I42 at the remote end of the conveying arm I30, as soon as said cross-pin has entered said crotch I42, upon the upward swing of the conveying arm during the unlocking operation. After bolt I90 has receded, the casing I32 is turned, the chain I39 loses its tautness, whereupon spring I14 shifts the cross pin I 40 in the arcual crotch opening I10, to be intercepted by arm I30 moving upward. Now latch I43, is shifted to lock the free end of the chain to the arm I30 as aforesaid, the gage arm I59 is swung upward because tooth I63 is against stop I64, and the lock structure assumes the initial position, with bolt I90 again in casing slot I94. In rest position, slots I99 and 206 are in alignment.

From the inside surface of the door, it is evident that upon insertion of key I89, in slot I88, and by turning the key, shaft I12, will be turned, whereby the lock is operated. To insure that upon withdrawal of the key from said slot I88, that slots I99 and 206 shall be in alignment, the key is provided with notch 209, which becomes engaged on the segmental internal flange segments 2 I 0 in the bushing I36, but which is free of said segments, when the key has reached the notches 2I I, so that it may be withdrawn from the key-slot I88, when said slots I99 and 206 are in required aligned position.

This invention is capable of numerous forms and various applications without departing from the essential features herein disclosed. It is therefore intended and desired that the embodiment shown herein be deemed illustrative and not restrictive, and that the patent shall cover whatever features of patentable novelty exist in the invention disclosed; reference being had to the following claims rather than to the specific description herein to indicate the scope of the invention.

I claim:

1. In a lock of the type described, the combination of a plate adapted to be mounted on a door, a casing having a radially outwardly extending chain conveying arm, journalled to the plate, a shaft journalled to said plate, extending within the casing, a gear secured on the shaft, and an internal gear mounted within the casing, adapted to be driven by the gear on the shaft; the casing and. internal gear being provided with a lug and a pair of stops respectively; said lug being positioned between and adapted to contact said stops successively, whereby upon rotation of the shaft, the internal gear will turn free of the casing for a short interval of time, and upon continued rotation, will engage and turn the casing to swing the chain conveying arm.

2. A combination as in claim 1, including a bolt movably mounted on the plate, adapted to engage the casing and fix its position, and a cam mounted on the shaft; said cam being adapted to shift the bolt out of engagement with the casing during the interval the internal gear revolves free within the casing.

3. In a lock of the type described, the combination of a plate adapted to be mounted on a door, a casing journalled to the plate, having a radially, outwardly extending chain conveying arm, a chain secured at one end to the casing; said arm being adapted to admit and engage the free end of the chain, a latch slidably mounted on the arm and extending into the casing, adapted to lock the free end of the chain to the arm, a shaft journalled to the plate and extending into the casing, and a cam carried on the shaft; said cam being adapted to control the movement of the latch upon rotation of the shaft.

4. In a lock for a door and its jamb, the combination of a chain secured at one end to one of them, a pair of members, each adapted to admit and engage the free end of the chain, mounted on the door and jamb respectively; one fixed and the other pivoted; the free end of the chain being removably engaged in one of said members, a gage arm pivotally mounted with respect to the moving member, adapted to be received by the fixed member, means to swing the first pivoted member whereby the free end of the chain is conveyed to leave the member it had first been in engagement with and to enter and become engaged by the other of said members to effect or remove a chain connection between the door and jamb, and means whereby the gage arm is swung by the first pivoted member in the direction of travel of the latter during the last portion of this 7 

